2014 update of the U.S. national seismic hazard maps

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We held 8 regional and topical workshops across the U.S. to gather information for these maps. The maps were available to the public for comment during a 60-day period. A Steering Committee (9 experts) was assembled to review the inputs and results and provide additional insights. The maps have been presented at several professional meetings.


In this talk we discuss:


(1) CEUS, (2) WUS (outside California), (3) California, (4) Ground motion models


We discuss the hazard maps and hazard curves used in the building code. The maps in this presentation are for 2% probability of exceedance in 50 years on a uniform firm rock site condition (VS30=760 m/s). Maps are for 0.2 s (5 Hz) spectral acceleration with 5% damping.


We consider difference maps (2014-2008) and ratio maps (2014/2008).

Publication type Book
Publication Subtype Conference publication
Title 2014 update of the U.S. national seismic hazard maps
Year Published 2014
Language English
Publisher USGS National Seismic Hazard Mapping Project
Publisher location Reston, VA
Contributing office(s) Geologic Hazards Science Center
Description 17 p.
Conference Title Tenth U.S. National Conference on Earthquake Engineering
Conference Location Anchorage, AK
Conference Date July 21-25, 2014
Online Only (Y/N) N
Additional Online Files (Y/N) N
Google Analytic Metrics Metrics page
Additional publication details